code: def gather_hostname():
      return socket.gethostname()
  
file_path: tensorflow-upstream/tensorflow/tools/test/system_info_lib.py
imports: import glob
  import multiprocessing
  import platform
  import re
  import socket
  import cpuinfo
  import psutil
  from tensorflow.core.util import test_log_pb2
  from tensorflow.python.client import device_lib
  from tensorflow.python.framework import errors
  from tensorflow.python.platform import gfile
  from tensorflow.tools.test import gpu_info_lib
label_desc: Use image node_id 2 for calling a global function with example usage: gather_hostname() and returns: socket